/*
 * Copyright 2010 jun.enomoto<jun.enomoto@gmail.com>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package foursquare4j.xml.handler;

import org.xml.sax.Attributes;
import org.xml.sax.SAXException;

import foursquare4j.types.Category;
import foursquare4j.types.Checkin;
import foursquare4j.types.Checkins;
import foursquare4j.types.Venue;

public class HistoryHandler extends Handler<Checkins> {

	private static enum E {
		_, CHECKIN, CHECKIN_VENUE, CHECKIN_VENUE_PRIMARYCATEGORY
	}

	private E e;

	private Checkins checkins;
	private Checkin checkin;

	@Override
	public void startDocument() throws SAXException {
		checkins = new Checkins();
	}

	@Override
	public void startElement(final String uri, final String localName, final String qName, final Attributes attributes) throws SAXException {
		super.startElement(uri, localName, qName, attributes);
		if ("checkins".equals(qName)) e = E._;
		else if ("checkin".equals(qName) && e == E._) {
			e = E.CHECKIN;
			checkins.add(checkin = new Checkin());
		} else if ("venue".equals(qName) && e == E.CHECKIN) {
			e = E.CHECKIN_VENUE;
			checkin.setVenue(new Venue());
		} else if ("primarycategory".equals(qName) && e == E.CHECKIN_VENUE) {
			e = E.CHECKIN_VENUE_PRIMARYCATEGORY;
			checkin.getVenue().setPrimarycategory(new Category());
		}
	}

	@Override
	public void endElement(final String uri, final String localName, final String qName) throws SAXException {
		if ("checkins".equals(qName) && e == E._) e = null;
		else if ("checkin".equals(qName) && e == E.CHECKIN) e = E._;
		else if ("venue".equals(qName) && e == E.CHECKIN_VENUE) e = E.CHECKIN;
		else if ("primarycategory".equals(qName) && e == E.CHECKIN_VENUE_PRIMARYCATEGORY) e = E.CHECKIN_VENUE;
	}

	@Override
	public void characters(final String text) throws SAXException {
		switch (e) {
			case _:
				break;
			case CHECKIN:
				set(checkin, tag, text);
				break;
			case CHECKIN_VENUE:
				set(checkin.getVenue(), tag, text);
				break;
			case CHECKIN_VENUE_PRIMARYCATEGORY:
				set(checkin.getVenue().getPrimarycategory(), tag, text);
				break;
		}
	}

	@Override
	public Checkins getObject() {
		return checkins;
	}
}